<template>
  <!-- 底部部分 -->
    <footer class="footer">
      <span class="todo-count">剩余<strong>{{list.length}}</strong></span>
      <ul class="filters" @click="$emit('changetype',type)">
        <li>
          <a @click.prevent="type = 'all'" :class="{selected:type === 'all'}" href="#/">全部</a>
        </li>
        <li>
          <a @click.prevent="type = 'active'" :class="{selected:type === 'active'}" href="#/active">进行中</a>
        </li>
        <li>
          <a @click.prevent="type = 'completed'" :class="{selected:type === 'completed'}" href="#/completed">已完成</a>
        </li>
      </ul>
      <button @click="deldesk" v-show="showClear" class="clear-completed">清除已完成</button>
    </footer>
</template>

<script>
export default {
  props:{
    list:{
      require:true,
      type:Array
    }
  },
  data()  {
    return {
      type:'all'
    }
  },
  methods:{
    deldesk() {
      this.$emit('hdeldesk')
    },
  },
  computed:{
    showClear() {
      return this.list.some(item => item.isDone)
    }
  }
}
</script>

<style>

</style>